Syncthing

Syncthing is an open-source and peer-to-peer software. It can be used to synchronize files between two or more devices over the network, be it a local network or the internet.

Key Features:

• No central server or cloud dependency
• Direct device-to-device synchronization
• Uses Block Exchange Protocol with TLS encryption
• Works on local networks and over the internet
• No file size or number limits
• Cross-platform: Windows, macOS, Linux, Android

Perfect for: Users who want file synchronization without relying on third-party cloud services.